Flutter Json Encode List

The default reviver (when not provided) is the identity function. Id)) The Json. Unmarshal just replace json with jsoniter. json_string #. Showing JSON Response into ListView Widget in Flutter. Flutter Spring Git View all Videos > Paths We first use StyledWriter and then FastWriter to encode the JSON value in newValue, writing each string to the console. srikanth at 23-11-2018 20:33:43 In this article, I'm going to share you the example of how to create a List of Cards from a JSON source. How To Convert Python List To JSON Example. In the open dialog, select Flutter. Twig - The flexible, fast, and secure template engine for PHP json_encode - Documentation - Twig - The flexible, fast, and secure PHP template engine About. The “GlossDiv” contains a “title” and a “GlossList”, etc. jpg The next things I would be looking at are. You might need to create lists that display different types of content. In both cases, the use of top-level simple messages (null, bool, num, and String) is supported (by the Flutter SDK). A list is a specification type consisting of a finite ordered sequence of items. Dealing with JSON Arrays and Objects in PHPedit A common source of confusion with the client revolves around JSON arrays and objects, and how to specify them in PHP. The three JAR files (projects) in the Jackson JSON API are: Jackson Core Jackson Annotations Jackson Databind These projects use each other in that sequence too. And all utilities work exactly the same way — load JSON, get result. JSON (JavaScript Object Notation), specified by RFC 7159 (which obsoletes RFC 4627) and by ECMA-404, is a lightweight data interchange format inspired by JavaScript object literal syntax (although it is not a strict subset of JavaScript ). However, the JSON format does support escaping of unicode characters, which are encoded using a backslash followed by a lower case "u" and 4 hex characters, for example: "Z\u00FCrich". JSON is one kind of data format which is designer for running JavaScript on websites. In the examples above we always used bytes and strings as intermediates between the data and JSON representation on standard out. This is my class for Json. It features: Jansson's mailing list is jansson-users at Google Groups. A note of caution: If you are wondering why json_encode() encodes your PHP array as a JSON object instead of a JSON array, you might want to double check your array keys because json_encode() assumes that you array is an object if your keys are not sequential. We attached our JSON data using the CURLOPT_POSTFIELDS option. This site uses cookies for analytics, personalized content and ads. or you can visit https://flutter. If value contains objects that are not directly encodable to a JSON string (a value that is not a number, boolean, string, null, list or a map with string keys), the toEncodable function is used to convert it to an object that must be directly encodable. An ordered list of values. encoding property: >>> r. For a list of links to projects we know about, see the third-party add-ons wiki page. Many HTTP APIs support multiple response formats, so that developers can choose the one they’re more comfortable parsing. Mixed Data Streams ¶. Flutter | Json自动反序列化——json_serializable(附源码) 前言. In various programming languages, it is called as array, vector, list, or sequence. The handle to use with this request. If the queue manager name includes a forward slash, a period, or a percent sign, these characters must be URL encoded: A forward slash (/) must be encoded as %2F. Using MVC Razor, you can encode an object into the data attribute of an html element with the following command syntax combination: @Html. Encode the name and id properties directly to the container. On decoding, the default concrete class of java. The default reviver (when not provided) is the identity function. 18 22:46 Spring 을 BackEnd 로 사용 하며 DB의 데이터를 가지고 올때 JSON 의 형태로 리스트로 받을때. In this page, you will learn about PHP json_encode() function with example. En la mayoría de los casos, este modelo simplifica la programación y es lo suficientemente rápido para no resultar en un mal rendimiento de la app o en animaciones a saltos, a menudo llamadas jank. Before you start with encoding and decoding JSON using Python, you need to install any of the JSON modules available. simplejson exposes an API familiar to users of the standard library marshal and pickle modules. This sounds like a straightforward task but there was a small twist to the story. By default, it will place the parsed JSON in the root (top level) of the Logstash event, but this filter can be configured to place the JSON into any arbitrary event field, using the target. Instead, JSON is interpreted as a map; Map to be exact. Accept payment quickly and securely using the standard method by calling the hosted/pay endpoint. String If it’s a String, then it will be encoded using encoding and used as the body of the request. This is a reference implementation. Do not use this version other than for historical reference purposes. 11 Flutter: Sliding menu using a Drawer. Like JSON it allows the transmission of data objects that contain name-value pairs, but in a more concise manner. NET object property names to the JSON property names and copies the values for you. In PHP the json_encode() function is used to encode a value to JSON format. The JSON-Java library is also known as org. Access the database, and fill an array with the requested data. And the reason for dartson and similar reflection-based JSON libraries not working with Flutter is because dart:mirrors isn't supported, due to interfering with tree-shaking. to_json() to denote a missing Index name, and the subsequent read_json() operation. Apr 16, 2013, 5:21 PM Post #1 of 22 (7127 views) Permalink. In this video, we are going to learn how to use FutureBuilder to populate a list asynchronously in Flutter. Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information. Add the array to an object, and return the object as JSON using the json_encode() function. Thanks for visiting Dan's Tools. ^ The PHP documentation for json_encode provides a list of options available. core plugin. The decoded value will be null/nil for null, and identical to what would result from decoding a singleton JSON array with a Boolean, number, or string value, and then extracting its single element. In this example, the top-level dictionary contains a single key, “glossary” and it’s corresponding value. 一、前言Flutter目前正在高速发展,而要学习Flutter,那么解析JSON肯定是必不可少的。Flutter中的JSON解析主要有下面两种方式。二、手动解析用于比较简单的json还是挺方便的,写法 博文 来自: lerendan的博客. For "json", parameters are automatically "unboxed" (i. When I talk about use, I mean the whole process from beginning to end, including parsing, analyzing the API documentation for exchanging data, converting the information received about the API, generating code based on the information received and, in fact, using this code to encode and decoding data. NOTE: The hierarchal functionality of JSON is available through special ds_map and ds_list functions, so you are able to encode sub-lists and maps. How to Return JSON-Encoded Response. Example: decoding JSON from HTTPS GET. 12 Flutter: Animations. 12 of JSON::Color (from Perl distribution JSON-Color), released on 2016-08-23. Make your XML file easier to read with this simple tool. NEW Basque Linen Vanity Bag 'Souraide' in Black & White by The Design Gift Shop,Dermalogica Exfoliator DAILY MICROFOLIANT 75g/2. ̸̸̸̨̨̨̨Love ų̸̸̨. Write json data in file. Include Dependencies. fromJson sebagai dynamic. If the source data contains special characters, the FOR JSON clause escapes them in the JSON output with \, as shown in the following table. A note of caution: If you are wondering why json_encode() encodes your PHP array as a JSON object instead of a JSON array, you might want to double check your array keys because json_encode() assumes that you array is an object if your keys are not sequential. srikanth at 23-11-2018 20:33:43 In this article, I'm going to share you the example of how to create a List of Cards from a JSON source. Now that there is a basic user interface, I'm going to create some mock data to display in it. Using json_encode(), you'll always get a properly formatted JavaScript object. You can use any http library you prefer import json data = { "txref": "MC-1520443531487", #this is the reference from the payment button response after customer paid. For our example let’s use the default json the tool prefills. In the tutorial, JavaSampleApproach will guide you how to use Kotlin language for converting. However, you’ll also want to be able to use your custom types. Reads JSON formatted content, creating one event per element in a JSON array. Quick Site Developer is leading web Design, seo and hosting company in salem chennai india, it provides a variety of services, Website design, website redesign, website maintenance, SEO services, web hosting, php development, ecommerce website, box label design and brochure design in Chennai, Salem, Coimbatore,. As a refresher, encoding is the act of taking an object instance and representing it as JSON. Example: decoding JSON from HTTPS GET. UTF-8 is a common variable-width encoding that can represent every character in the Unicode character set. These functions are json_encode() and json_decode(), respectively. Include Dependencies. If encoding is omitted, UTF8 is used. You'll see hands-on examples of working with Python's built-in "json" module all the way up to encoding and decoding custom objects. JSON is a lightweight data-interchange format. Find file Copy path Fetching contributors… Cannot retrieve contributors at this time. JSON showing all the possible language codes. This sounds like a straightforward task but there was a small twist to the story. Bu site bize json yapılarımızı uygulama içerisinde kolaylıkla kullanabilmemiz için o modele uygun model sınıfını yaratacak ve encode, decode methodlarının kısayollarını vericek. Force encoded string to be ASCII. NET / MVC / Passing Mvc Model using Json to Controller Passing Mvc Model using Json to Controller [Answered] RSS 9 replies. Encode is used to convert Object to string, so, if you need the JSON string, you could use it, if you just need the JSON Object, you don’t need convert to string. The goal of this document is to get you up and running with httr as quickly as possible. dumps(list). Using MVC Razor, you can encode an object into the data attribute of an html element with the following command syntax combination: @Html. JSON (JavaScript Object Notation), specified by RFC 7159 (which obsoletes RFC 4627) and by ECMA-404, is a lightweight data interchange format inspired by JavaScript object literal syntax (although it is not a strict subset of JavaScript ). Converts a data object to a string that is in the JavaScript Object Notation (JSON) format. The ListView also supports removing item from the list - Flutter ListView example. ya veo, el json que muestras te retorna solo un objeto Persona, entonces no necesitas una lista , porque usas List ? – diegoveloper el 12 jun. In the JSON below, if someone could show me some code that would get me to the trainId field (about 10 lines from the bottom), I could probably figure out everything else from that since that would be one of the deepest levels of this JSON. fromJson merupaka initializer list konstruktor hampir sama dengan fungsi kelas di Data, perbedaannya kita akan mengolah list data. Gives a detailed explanation of working with simple and complex JSON structures using dart:convert library in Flutter along with a sample project with 6 examples to experiment with. We’re gonna need to add some libraries in the pupspec. $ flutter run Launching lib/main. The GeoJSONP feed uses the same JSON response, but the GeoJSONP response is wrapped inside the function call. We encoded our PHP array into a JSON string by using the function json_encode. 10 Flutter: ListView with JSON or List Data. Renders each processed event as a dot. Flutter - Obter Json via http e exibir no ListView Na aula desta semana veremos como obter dados remotos no formato JSON e exibir o resultado no ListView usando o construtor ListView. 可以看到Flutter使用的sdk中提供了dart:convert 包用于JSON的序列化和反序列化,其功能与iOS的NSJSONSerialization类似,都是直接将JSON数据转成NSDictionary / NSArray(或者JAVA中的Map/List), 然后开发时通过输入字段名字符串的方式从中取值,非常的不方便。. Flutter 联网和JSON转换成Bean. This is because index is also used by DataFrame. Scenario: There is a POJO with 6 different properties all are of type Strings. Showing JSON Response into ListView Widget in Flutter. In your Visual Studio Code, go to View menu > Command Palette. NET's powerful JSON serializer. simplejson exposes an API familiar to users of the standard library marshal and pickle modules. Add this to your package's pubspec. Wrap "myFunc()" around the return object. Geographic features need not be physical things; any thing with properties that are bounded in space may be considered a feature. Path expressions, like JSON text, should be encoded using the ascii, utf8, or utf8mb4 character set. In various programming languages, it is called as array, vector, list, or sequence. stringify() JSON. To map the wide range of characters used worldwide into the 60 or so allowed characters in a URI, a two-step process is used:. Source for the Youtube video: Flutter - Loading paged JSON data into the ListView - main. parse() method parses a JSON string, constructing the JavaScript value or object described by the string. This interface lets the implementer. Let’s start with the main function where the Flutter app run. Creating a Map object from a JSON content is pretty straightforward and integrated to the SDK with the dart:convert package. We’re gonna need to add some libraries in the pupspec. NET Web API. JSON Echovoice JSON Array Encode, Decode and Pretty methods. Example encodings in this documentation refer to that format. Textual JSON data always uses the Unicode character set. Encoding JSON text SHALL be encoded in Unicode. manually, using the JSON. return Kits(json['COUNTRY'], json['FRANCHISE'], json['TYPE'], json['BRAND'], json['PROCEDURE'], json['TRAYDESCRIPTION'], json['TRAYMATERIALID'] /* <-- INT*/ );. Key Features. Please see my article, Building Forms with Flutter I have a section in this article (towards the bottom) called Adding Validation. Scoped model is a utility that enables a reactive model to be passed to a child of a ScopedModel widget and its descendants. Tap to view contact info in an external browser. A simple and lightweight JSON data container for Dart and Flutter. Thanks to James who made it possible as the fastest framework for manipulating JSON with great documentation. JavaScript Object Notation (aka JSON) is a very popular alternative to XML for transmitting data to the web browser. So you're most likely to see dates encoded as strings. Also, notice that in decode method I don't check if any value is a complex object and thus requires decoding from json: this is done because again, no idea on how to do that subclassing aware, do I went with "class"_id based approach and a single level complex object representation (this can be seen in encode method, that wipes all non-trivial. Check more tutorials on GalleonSoft about Kotlin, Android Tutorials, Flutter example, Kotlin android etc. There are no ads, popups or nonsense, just a JSON string extractor. Syntax: json_encode(value, options. endDoc : Pointer on the end of the UTF-8 encoded string of the document to read. Thanks for visiting Dan's Tools. 0, PECL json >= 1. Syntactically it resembles the objects and lists of JavaScript. # A flutter plugin to use convert Json to Form. Attributes are converted to String properties. All JSON tools are simple, free and easy to use. Scenario: There is a POJO with 6 different properties all are of type Strings. If you're unsure how to set up a Flutter app, check out Getting started with Flutter official tutorial. Flutter 联网和JSON转换成Bean. Make a network request using the http package. json은 두개의 구조를 기본으로 두고 있다: name/value 형태의 쌍으로 collection 타입. Video about making the HTTP Request and using REST APIs: https. It doesn't seem that bad at the first glance, but remember that…. The Flutter’s Project Structure. 编码(Object->JSON String) 支持int, double, String, bool, null, List, Map (with string keys). Serializing Collections To serialize a collection - a generic list, array, dictionary, or your own custom collection - simply call the serializer with the object you want to get JSON for. In various programming languages, it is called as array, vector, list, or sequence. endDoc : Pointer on the end of the UTF-8 encoded string of the document to read. Encode the toy's name directly into the container, using the gift key; Run the playground and inspect the value of the encoded string - it will match the JSON at the top of this section. In MyApp class, add new member variable, products of type Future and include it in constructor. dumps to convert a dictionary to a json encoded string. Data json[‘data’] yang bertipe List akan diiterasi dengan map yang setiap iterasi didalamnya yakni “i” akan dimasukkan kedalam instansiasi objek baru Data. in the next part we see how to build a JSON using a tree approach. Key Features. We'll cover both encoding and decoding. First, for Json. You can use any http library you prefer import json data = { "txref": "MC-1520443531487", #this is the reference from the payment button response after customer paid. The json_encode() function returns the JSON representation of a value. JSON Web Token (JWT) defines a token format that can encode claims transferred between two parties. In this example, we specifically go for Convert Python Dictionary To JSON. NET / MVC / Passing Mvc Model using Json to Controller Passing Mvc Model using Json to Controller [Answered] RSS 9 replies. When using a tool, your data are secured because they don't transit on a network. Other character encodings are implicitly coerced to utf8mb4. 虽然我们不能在Flutter中使用运行时反射,但有些库为我们提供了类似易于使用的API,但它们是基于代码生成的。这种方法在代码生成库部分有更详细的介绍。 使用 dart:convert手动序列化JSON. Let's create a new Widget called CryptoListWidget. depth − It is an integer type parameter which specifies recursion depth. Rave by flutterwave documentation. By default, it will place the parsed JSON in the root (top level) of the Logstash event, but this filter can be configured to place the JSON into any arbitrary event field, using the target. class Players{ List<Player> players; Players({this. Also, with image cached. Create a top level assets folder (same level as lib folder), then, inside it, a new directory named data, and then copy the following JSON file, named crossword. While you haven't built any apps using Flutter, let me give you a quick overview of its project structure. Shorthand for json. Ultimate source of learning Flutter. JSON is a standard lightweight data-interchange format which is quick and easy to parse and generate. Flutter HTTP JSON ListView MasterDetail Images Text Tutorial How to download JSON with images and Text via HTTP and bind to a custom listview with WANT TO HOST YOUR ANDROID APPS BACKEND OR WEBSITE. Welcome to the Flutter Cupertino codelab! In this codelab, you'll create a Cupertino (iOS-style) app using Flutter. Parse and convert the JSON into a list of photos. It calls the httpbin. The encoding to be used for the feed. json_serializable自动反序列化序言众所周知flutter中提供了JSON转Map的方法,而反序列化是需要手写的;在项目中一般都会有字段比较多的情况,例如用户信息表字段是比较多的,在这样 博文 来自: 尼伯特的博客. NULL is returned if the json cannot be decoded or if the encoded data is deeper than the recursion limit. Destacado en Meta Feedback post: Moderator review and reinstatement processes. In many ways, you can think of JSON as an alternative to XML — at least in terms of web applications. Play around with JSON-LD markup by typing out some JSON below and seeing what gets generated from it at the bottom of the page. Escapes or unescapes a JSON string removing traces of offending characters that could prevent parsing. This overhead can be reduced by instructing Marten to not perform deserialization and instead just return the JSON string as stored in PostgreSQL. Raw() method is used to emit the supplied object as html. Introduction. stringify() JSON. json (not to be confused with Google's org. After requesting data from the server, the server will often return a json string and if we want to use data flexibly, we need to convert the json string into an objectobject. However, the JSON format does support escaping of unicode characters, which are encoded using a backslash followed by a lower case "u" and 4 hex characters, for example: "Z\u00FCrich". Automatic JSON date parsing with AngularJS. list method returns metadata about the search performed, metadata about the custom search engine used for the search, and the search results. Jansson is a C library for encoding, decoding and manipulating JSON data. It covers which JSON solution to use in different scenarios, and why. that age is a number), and would need something like a schema to encode the same information as the JSON example above does as is. 当我写body:json. put("ID", new Integer(id)); return obj. is_valid (bson) ¶ Check that the given string represents valid BSON data. It is based on the already successful JSON format and provides a way to help JSON data interoperate at Web-scale. or you can visit https://flutter. JSON (JavaScript Object Notation), specified by RFC 7159 (which obsoletes RFC 4627) and by ECMA-404, is a lightweight data interchange format inspired by JavaScript object literal syntax (although it is not a strict subset of JavaScript ). It resembles a database table. A list is a specification type consisting of a finite ordered sequence of items. Create new Flutter Project. json exposes an API familiar to users of the standard library marshal and pickle modules. Use the vlan_parser filter to manipulate an unsorted list of VLAN integers into a sorted string list of integers according to IOS-like VLAN list rules. A protip by cboji about python, json, excel, and csv. GitHub is home to over 40 million developers working together to host and review code, manage projects, and build software together. Used internally until the public release of WS3V. Play around with JSON-LD markup by typing out some JSON below and seeing what gets generated from it at the bottom of the page. public static string Encode (object value); static member Encode : obj -> string. How to Return JSON-Encoded Response. If the body is a List, then it’s used as a list of bytes for the body of the request. The Flutter framework offers several widgets you can use to efficiently, and. Now lets we perform our first encoding example with Python. The new version of Swift introduced classes and APIs that make JSON parsing easy to handle. 11 Flutter: Sliding menu using a Drawer. We make use of the JSON Annotation , JSON Serializable and Build Runner plugins to annotate these objects and then generate a large amount of boilerplate code that will help us convert our responses and. For "json", parameters are automatically "unboxed" (i. Flutter is an open-source mobile application development SDK created by Google. This is actually really easy: [code]import json my_list = [ 'a', 'b', 'c'] my_json_string = json. Just JSON utilities that work right in your browser. It is also possible to build a json using a simple tree model. Now that there is a basic user interface, I'm going to create some mock data to display in it. JSON is a format to encode object data derived from Javascript, but now widely used as a data exchange format on the internet. First, add the http dependencies to your pubspec. The feed is represented as a JSON object; each nested element or attribute is represented as a name/value property of the object. If your concern was ONLY the first-level array (e. Encoding PHP array to JSON, how to encode square brackets [] Wed, 09/02/2015 To make square brackets in JSON, which is basically array in JSON you need to write array twice. A protip by cboji about python, json, excel, and csv. toString());print('Howdy,. that age is a number), and would need something like a schema to encode the same information as the JSON example above does as is. dotnet add package Newtonsoft. In the following tutorial, I will show you how to build a simple weather app using Flutter and how …. The issue I'm having only happens with the webhttpbinding and only when the user requests a json response, then instead of receiving a base64 encoded string for my byte array, we get a large array of numbers which is a much larger payload size then a base64 string. Flutter installation, Flutter widget, Flutter Tutorial Flutter providing us http to connect a mobile app with a server for performing GET, POST and other requests. JSON (JavaScript Object Notation) is a simple data interchange format. Now that we have a list of currencies, let's go ahead to build the UI to show that list. This course is truly for anyone looking to use Flutter to build real-world, production-ready mobile apps, beyond the level of an introductory course. \ Must be >= beginDoc. Flutter/Dart - Convert (Serialize) Object to JSON / String Posted on 09 Mar 2019 by Ivan Andrianto If you're developing a Flutter application (or any application using Dart language) and you need to convert (serialize or stringify) a Dart object to JSON object or string, you come to the right place. json (not to be confused with Google's org. 简单介绍下怎么在flutter中处理json数据. return Kits(json['COUNTRY'], json['FRANCHISE'], json['TYPE'], json['BRAND'], json['PROCEDURE'], json['TRAYDESCRIPTION'], json['TRAYMATERIALID'] /* <-- INT*/ );. Working with the JSON functions Setting up form, list, and table views for a layout. 2 days ago · The JSON data from the API is an array of these cards, so we just need to unmarshal to a slice of RingsCard and loop over them to populate our map. Like JSON it allows the transmission of data objects that contain name-value pairs, but in a more concise manner. Used internally until the public release of WS3V. I have a list of records, I want to convert 1 attribute of these records into a JSON string so that I can push them into an array. JSON is an agreed upon format for webservices, APIs and apps. I have service with multiple bindings. Status of This Memo This is an Internet Standards Track document. , into a specified format. As a refresher, encoding is the act of taking an object instance and representing it as JSON. A list of Java objects gets serialized to a list of JSON objects containing the fields and their values. root [out] Contains the root value of the document if it was successfully parsed. simple, java json encode, java json encode using map, java json array encode, java json array encode using List, java json decode. In a multi-level array, JSON_FORCE_OBJECT will encode ALL nested numeric arrays as objects. Add the array to an object, and return the object as JSON using the json_encode() function. If I open the converted CSV file with Sublime, all Chinese words are correct. Here's how you can create such a structure with Flutter: 1. Q&A for Work. Now that we have a list of currencies, let's go ahead to build the UI to show that list. Support gson. Response into a list of Dart objects. GeoJSON uses the JSON standard. In this Flutter Video tutorial, we create a series of objects to help with JSON serialization and decoding for our weather application. Syntax: json_encode(value, options. Json --version 9. ~ Developer Libs. If you want the root type to be an object type, not an array, but you need more samples at root level, you can use the SampleIsList parameter. Write json data in file. World's simplest base64 encoder. writeValueAsString(anyObject); [/code]. They are all available here for free for the developers and users out there who might find them useful. However, if your data contains HTML, there are certain things that you need to do to keep the browser happy when using your JSON data within Javascript. JavaScript Object Notation (JSON) is a standard text-based format for representing structured data based on JavaScript object syntax. mou_inn if action method return json result set then what happen? do we need to use Json. Note that the XML examples below don't encode the data type (e. In this post let's talk about making http requests from your Flutter apps. Generate code with build_runner. 这种方法比较适合数据量比较小的接口,例如下面的示例,使用时只需new AuthorEntity. Or at least don't use it as an up to date source for working with JSON in Flutter. This sample serializes an object to JSON. jpg and you can then do a Canny edge detection like this: convert image. Encoding JSON text SHALL be encoded in Unicode. Returns the value encoded in json in appropriate PHP type. Convert the request into an object, using the PHP function json_decode(). Random Word Generator; NTLM Hash Generator; Password Generator; String Builder; NUMBER to WORD Converter; WORD COUNTER; Reverse String; HTML Encode; HTML Decode; Base64-Encode; Base64-Decode; URL-Encode A String; URL-Decode A String; String to Hex Converter. JSON-RPC is a stateless, light-weight remote procedure call (RPC) protocol. I believe the developers who do app development in flutter will encounter such problems. decode(response. It is used to develop applications for Android and iOS. 如果我写body:data我得到错误类型'_InternalLinkedHashMap< String,dynamic>'不是类型转换中类型'String'的子类型这是数据对象var match = { 'homeTeam': {'t. Flutter installation, Flutter widget, Flutter Tutorial Flutter application and see how to parse a JSON locally within our app. has_c ¶ Is the C extension installed? bson. We’re gonna need to add some libraries in the pupspec. Rave by flutterwave documentation. You have two options for encoding objects that aren't directly encodable. In general, it is best to avoid mixing Unicode escapes in JSON with a non-UTF8 database encoding, if possible. If value contains objects that are not directly encodable to a JSON string (a value that is not a number, boolean, string, null, list or a map with string keys), the toEncodable function is used to convert it to an object that must be directly encodable. Furthermore, this library can also convert between JSON, XML, HTTP Headers, Cookies, Comma-Delimited List or Text, etc.